File E241994 Vol. 1 Sec. 2 Page 2 Issued: 2008-04-01
and Report
TECHNICAL CONSIDERATIONS (NOT FOR FIELD REPRESENTATIVE USE):
Use - For use only in products where the acceptability of the combination
is determined by Underwriters Laboratories Inc.
1. The acceptability of construction features of the transformer motor or coil
assemblies, such as spacings, insulation thicknesses (greater than those
specified under "Construction Details"), thickness and voltage rating of
lead insulation (if applicable), etc., shall be determined in the end-use
application.
2. The suitability for use when exposed to oil, chemicals, refrigerant, soaps,
x-rays, ultraviolet light and the like, has not been determined by this
investigation.
3. The only materials listed in these insulation systems that have been
evaluated for their long term electrical capabilities are those materials
listed as Ground Insulation, Interwinding Insulation, Magnet Wire
Insulation, Filament Wire Insulation, Winding Wire Insulation and
Encapsulants. All other materials listed in these insulation systems have
only been evaluated for chemical compatibility. As a result the long term
reliability of these other materials, such as potting compounds, tapes,
minor sheet insulation, etc., as electrical insulation or as a means to
reduce spacings has not been evaluated as part if this Recognition.
4. Ground insulation, in at least the minimum thickness specified, must always
be used between the windings and grounded metal and/or the magnetic cores
of devices. Ground insulation for motors may be referred to as slot
insulation. Materials not listed under ground and interwinding insulation
may not be used for these functions even if listed elsewhere in the system
description.
5. Interwinding insulation, in the minimum thickness specified, must always
be used between any two isolated windings in a transformer, with the
exception that it is not required between the series-parallel winding of
multivoltage devices. Materials not listed under ground and interwinding
insulation may not be used for these functions even if listed elsewhere in
the system description.
